Clamping device for paperhangers&#39; outfits



Dec. 17, 1940. M. c. HARRISON CLAMPING DEVICE VFOR PAPERHANGERS' OUTFITS Filed April 25, 1940 QMIH'N N.

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WN NN Patented Dec. 17, 1940 t PATENT orties I OLAP/irrite DEVICE Fon PAPERHANGERS oU'rFI'rs Mortimer G. HarrisomChicago, Ill.

Application lApril 25, 1940', Serial'No. 331,527

10 Claims.

This invention relates to a clamping device for paperhangers outfits, including table or bench boards, trusses, horses or props anda straight edge of wood or metal.

Still another object of the present invention is to provide an improvement upon the device shown in my prior application, Serial Number 324,648, led March 18, 1940 so as to tightlyclamp paperhangers boards and vaccessories or supple,- mental members of paperhangers outfits irrespective of the variations in the thicknessof .the boards. I have found that there are many .different thicknesses in paperhangers boards vand also that the straight .edges vary asmall degree in thickness. Some paperhangershave .gone to the trouble of having eXtra heavy .boardsmade .specially for them to give greater rigidity orstirfness and these `boards aremuch heavier-.than thestock sizedboardsordinarily sold as .part of paperhangers outfits.

and straight edges .under such circumstances and the present clamp is designed to takecareof these differences.

Another Vobject of the .invention isA to avoid bending or exing of the top part of the clamp under stress :and to so reenforce the same that it will be kept comparatively rigid `or prevented from bendingand thus give an even `bearingon the trestles and straight edge when in clamping position.

Another object of .the invention is to 4provide a rubber or cushion packing which will take up the difference in thicknesses of said edges and trestles, this being provided on the top part of the clamp to permit the spaces between said edge and the trestles to be any desired width so that the pressure on the rubber against the straight edge and trestles will rmly hold these parts and avoid mutilation thereof.

Still another object of the invention is to provide an improved clamping means for opposite ends of the clamping device so that the parts will be retained positively in clamping positions after being oncev adjusted according to the thickness' of the parts.

Still another object of the invention is to pro vide a novel clamping device of the above char acter which will facilitate packing thereof in a compact folded or collapsible condition; which will keep the boards straight; which will hold a Wood or steel straight edge firmly and prevent its displacement as well as avoid injury or mutilation to any of =the parts or loss of same land will avoid the necessity of having holes in the The old style clamps .did not effectively accommodate .and hold the boards.

board or straight edge in addition to being Very simple and capable of being quickly applied or removed.

Further objects and advantages will appear and be brought out more fully in the following specification, reference beinghad to the accompanying drawing, in which:

Fig. 1 is a plan view of a paperhangers outfit with the clamping devices applied and in use;

Fig. 2 is an enlarged transverse section taken on the line 2 2 of Fig. 1;

Fig. 3 is an end view'looking toward the left hand end of Fig. 2, showing the hinge joint and clamping means;

Fig. 4 is an end view looking toward'the right hand end in Fig. 2, showing the clamping means;

Fig. 5 is a plan view of the structure shown in Fig. 2;

Fig. 6 is an elevation of a clamping device with one end swung up degrees and turned at right angles thereto 90 degrees; and

Fig. '7 is a sectional view of the upper member of the clamp taken on the line 'I--1 of Fig. 5.

Referring to the drawing and more particularly to Figs. 1 to 6 inclusive, I0 designates van ordinary paperhangers outfit for which the present clamping device or clamp is devised to hold the outfit in compact form when not in use for transportation or storing purposes, and at the same time permit the outt to be readily taken apart and assembled or set up for use. This outt includes table or bench boards II, usually three in number having dowel pins I2 extending from one edge of each board and entering correspondingly located sockets 5I.3 on the other edge of .said boards v`so as to form one working surface. The bench or ltable is vdesigned Vto be supported on collapsible .or fo'ldable supports vin the form of horses, props or trestles I4 shown collapsible in Fig. 1. I5 which maybe of .any suitable construction such asmetal or wood reenforced with metal strips 'along the edges and 4bearing a scale 1,6, usually `,six feet 'long along one Yedge and having a cutting 'groove I'I adjacent theopposite Vedge Jto-facilitate .measuring and cutting of the paper.v The vclamping device or -clamp proper includes an upper lbar "I8 and .a lower .bar I9 of ,suitable spring -steeloriother desired metal. These bars form jaws, and the lower bar i9 may be str-aight or bowed up-slightly,. although when .the .device is applied it will assume a straight or :rectilinear form `against the face of one `of the boards ..I I. in the. Ina-nner yshown `in Fig. .-2 .of the drawing.. The'bar vI9 -is provided vwitha -pair of turnedup The outiit also includes a straight edge 40 ears at one end formed by providing a recess or bifurcation in said end and turning up the forked portions thus formed in circular formation. The opposite end is provided with similarly formed down turned ears 2 I.

The top or locking bar is designated at I8 and includes a vertical end portion 22 bent downwardly at right angles thereto and then bent or turned inwardly at right angles as at 23, both portions I8 and 23 having vertically aligned or registering circular holes 24 to take an I or T- bolt 25. Through the medium of a pivot or trunnion pin of an I or T-bolt 25 extending through.

the ears 2l] in case a T-bolt is used, or ears 28 and the eye of the bolt where an eye bolt is used, the bars are pivotally connected to swing to clamping or open position as indicated in solidV and dotted lines in Fig. 2 and as shown in Fig. 6. Extending at right angles to the portion 22 is a part 26 which is designated to clamp the straight edge I6, and then the bar I8 is bent outwardly at right angles as indicated at 21 and substantially parallel to the portion 23 to form a shoulder. This portion is then extended parallel to the part 26 and at right angles to the portion 21, as indicated at 23 and then inwardly or downwardly substantially at right angles as indicated at 29 parallel to the portions 22 and 21 but deeper than the latter portion to form a pocket 33. The purpose of making the portion 29 deeper or longer than the portion 2'I is that the straight edge I5 is interposed between the boards and the portion 26 whereas the portion 3l at the free end of the top bar I8 which extends outwardly substantially at right angles to the portion 23, engages directly with the top board of the boards Il. The free end portion of the clamping end 3I has a slot 32 communicating with the end thereof and formed by bifurcating or forking said end to take an I or T-bolt 33, a pivot or trunnion 34 extending at right angles thereto at one end of each bolt 25 and 33 serving to pivotally connect the bolts in the ears 20 and 2l to the ends of the bar I9. The threaded ends 35 of the bolts 25 and 33 are designed to take lock nuts 36 beneath bar I8 and a clamping or locking nut 31 and a wing nut 38 are screwed on the threads 35 of the bolts above the bar I8, and when the clamp is applied to the outfit, as shown in the drawing, the bolt 33 is swung up into the slot 32 and the nut turned down to tightly clamp the parts of the outfit and prevent possible displacement thereof.

In order to reenforce the upper bar or clamping member I8, the latter is provided with a truss or bridge work reenforcement 39 consisting of a narrow strip of metal in the form of a bow, with an intermediate wood ller 40 between its intermediate portion and the part 28 riveted or otherwise secured thereto as at 4I, so as to contact with the corner portions of the riser portions 21 and 29 at the ends of the part 28 and having the end portions 43 bent at obtuse angles and flat to engage the portions 26 and 3| to which they are riveted as at 44. Rubber or similar cushion strips 45 and 46 are glued to the under faces of the portions 26 and 28 to contact with the straight edge I5 and the trestles I4, as shown in Figs. 2 and '1. This will not only prevent injury to the latter parts, but will also accommodate trestles and the straight edges varying in thickness. Thus, it will accommodate extra heavy boards, although this is primarily taken care of by the vertical adjustment of the portion 22 on the bolt 25 by adjusting the nuts 36 and 31 up or down and the adjustment of the portion 3| and the bolt 33 by the nuts 36 and 3B. The nuts 36 are set at the required adjustment and then by turning the nuts 31 and 38 down tightly against the parts 26 and 3|, the device will be rmly clamped in position. In order to adjust the upper clamping member or bar I8, the latter is swung outwardly on the pivot 34, as shown in dotted lines in Fig. 2, and then turned on the bolt 25 as shown in Fig. 6, and inasmuch as the nut 36 cannot turn within or relative to the part 22, but will turn therewith, the nut 36 and the clamp member or bar I8 may be adjusted up or down to vary the space between it and the bottom clamping member or bar I9. In this way boards of 'much heavier stock than the boards ordinarily sold in conjunction with paperhangers outts may be accommodated and rmly clamped when the parts are assembled in folded condition. By having the top part of the clamp reenforced the top member will be kept straight or level and thus give an even bearing on the straight edge and trestles when folded into clamping position. The sponge rubber packing strips or cushions will allow the spaces between the straight edge and the trestles to be any width, as all pressure of the clamp is on the rubber pressing downwardly on the straight edge and trestles. At the wing nut side of the clamp the nut 36 under the slot 32 of the upper member will be adjusted in proper position or at a desired level with' the boards so that the wing nut may be turned down Very tight. This is very necessary in keeping the wing nut and bolt from getting knocked out of the slot and will hold the parts more firmly.

It will also be seen that this device obviates the necessity of having holes in the boards and straight edge and permits the straight edge to be clamped rmly along one edge or side of the boards instead of being disposed in the center, while the supports in the form of trestles, horses or props are clamped along side of the same. This is especially advantageous in clamping a metal straight edge as it will hold the same rmly and no holes are necessaryin the boards or straight edge. This is due to the fact that the clamping yaction is stronger where the bars of the clamp 'are pivoted together. Also, by having the bolts fastened to the frame of the clamp any chance of the bolts being lost is eliminated as it is unnecessary to remove the nuts from the bolts and the bolts from the clamp bars as with the hold device.

While I have described and illustrated the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters l'atent is:

1. A clamping device for paperhangers outfits including a pair of hinged bars spaced apart in clamping position throughout their lengths and clamping means carried by one end of one bar and designed to engage the adjacent end of the other bar., at least one end of one bar being adjustably connected at the hinged end for adjustment to vary the space between the bars.

2. A clamping device for paperhangers outfits including a pair of hinged bars of thin strip metal spaced apart in clamping relation throughout their lengths, one bar being offset in stepped relation from the other bar to accommodate the paperhangers outfit between the bars, a bolt hingedly attached to the free end of one bar and adapted to engage through a slot in the other bar, and clamping meansl on the bolt engaging on opposite sides of the slotted bar, the hinged connection of one bar with the other bar being adjustable along the connection to Vary the spac-v ing of the bars and adapted to be clamped in adjusted position.

3. A clamping device for paperhangers outfits including a pair 'of hinged bars, one bar having riser portions, and clamping means carried by one end of one bar and designed to engage the adjacent end of the other bar, one bar being disposed in spaced relation to the other bar from a point adjacent its hinged end and having an opening near the free end thereof, and a bolt at the free ened of the other bar to engage said opening and a nut on the bolt, one bar being adjustable along the hinged connection with the other bar.

4. A clamping device for paperhangers outfits including a bar, another bar hinged-to one end thereof and offset from the first bar adjacent said end, said second bar having angularly bent portions forming clamping portions, shoulders and a pocket and having an opening adjacent its free end, a bolt attached to the free end of the other bar to engage said opening, a bolt at the hinged connection of one bar, the other bar having slidable connection with said bolt, locking nuts on said bolts to limit the displacement of the latter bar toward the first bar and clamping nuts on said bolts to engage the top of the latter bar.

5. A clamping device for paperhangers outfits including a bar, another bar hinged to one end thereof and offset from the first bar adjacent said end, said second bar having angularly bent portions forming clamping portions, shoulders and a pockethaving three different risers and a slot at its free end, a bolt hinged to the free end of the other portion to extend substantiallyy at right angles to the bars and engage the slot, the hinged connection between the bars comprising a shank member, the second bar having a bent portion and apertured to engage such shank for adjustment thereon, locking means to hold the bar in adjusted position and clamping means on the bolt and shank.

6. A clamping device for paperhangers outfits comprising a bar, another bar having a depending and substantially at right angles with spaced apertured portions, a shank pivoted to the adjacent end of the rst bar and on which said end is adjustable toward and away from the first bar, said second bar having riser portions at different elevations forming shouldersy and an intermediate pocket, locking means between the bars and clamping means to connect the ends of the bars against the locking means.

'7. A clamping device for paperhangers outfits including a bar, a second bar having angular offset portions and end portion extending substantially at right angles, a bolt pivoted to the adjacent end of the rst bar and adjustably connected'to said right angular portion to pivot with thhe bolt and rotatable for adjustment thereon, clamping and locking means between the bolt and the second bar, another bolt pivoted at the opposite end of the rst bar and engaging a slot in the second bar, and clamping and locking means on the last mentioned bolt to engage upon opposite faces of the slotted end of the second bar.

8. A clamping device for paperhangers outfits including a pair of hinged bars, one of said bars having riser portions, a truss for said bar with the riser portions comprising a bow-shaped strip of metal with an intermediate filler between the bow and adjacent riser portion and end portions secured to the other riser portions, cushion strips secured beneath certain of said riser .portions adjacent the hinge and intermediately and clamping means carried by one end of one portion and having locking engagement with the adjacent end of the other bar.

9. A clamping device for paperhangers outts including a pair of bars disposed in spaced substantially parallel relation, meansl to pivotally and adjustably connect anend of one bar to the adjacent end of the other bar for adjustment to vary said spacing and to clamp same against movement in either direction, and means to adjustably connect and clamp the other ends of the bars against movement toward and away from each other.

10. A clamping device for paperhangers outfits including a substantially flat bar, shanks hinged to the ends thereof, another bar having one end bent downwardly and then inwardly, said latter bar and inwardly bent portions being mounted on one shank for adjustment along the same, clamping means on the shank on opposite sidesof the second bar, and clamping means on the other shank at opposite sides of the free end of the second bar, said free end being separable from its shank and clamping means to l permit it to be swung away from the first bar.

MORTIMER C. HARRISON. 

